Pico pt104 Datalogger
Sistemi

The PT-104 is a four channel
temperature measuring data logger. It offers the ultimate in resolution
(0.001 °C) and accuracy (0.01 °C) when used with
PT100 sensors. It can also be used to measure resistance and voltage.

Measures temperature, resistance and
voltage

High resolution and accuracy

No power supply required

For use with PT100 and PT1000 sensors

A wide range of PT-100 sensors are available
for use with the PT-104.

Accuracy and Resolution

Although accurate temperature sensors are
widely available, it has been difficult to take advantage of them due to
errors caused by the measuring device. The PT104 however, is inherently
accurate due to its novel design. Rather than relying on voltage references
(which tend to be temperature sensitive) it uses 'reference' resistors which
are extremely stable (low temperature co-efficient and drift). The exact
value of each resistor is stored in an EEPROM to provide the ultimate in
accuracy (yearly re-calibration is recommended). To achieve the 0.001 °C
resolution a state of the art ADC is used that can resolve to better than 1
part in 16 million.

Temperature

The PT104 measures temperature using platinum
resistance thermometers (PRTs). Both common industry standards (PT100 and
PT1000) are supported. The unit is compatible with 2, 3 and 4 wire sensors
(4 wire PT100 sensors are recommended for accurate measurements). More
information on sensors can be found below.

Resistance

When measuring resistance, the unit uses a
four-wire circuit to give the greatest possible accuracy.

Two resistance ranges are available (0 to 375
Ohms and 0 to 10,000 Ohms). The unit is calibrated for 0 to 375 Ohms so this
range should be used for accurate measurements.

Voltage

For voltage measurements, each input
connector can be treated as a differential input with ground, or two single
ended inputs. Both inputs must be zero Volts or above, though it does not
matter which input has the higher voltage.

Two voltage ranges are available (0 to 115 mV
and 0 to 2500 mV). For accurate measurements use the 0 to 2500 mV range.

Software

The PT-104 is supplied with PicoLog data
logging software for advanced data logging. PicoLog will automatically
detect which sensor is connected and will display readings in the correct
units. For users who wish to write their own custom software, drivers and
examples are supplied.

Remote Data Collection

The PT-104 is normally connected directly to
a PC, but it is also possible to communicate with the PT-104 using a modem (radio
or telephone) so that you can collect data from a remote site.